Macaroni And Cheese

Directions

1. 1
   Boil macaroni until tender and drain.
2. 2
   Stir in melted margarine and beaten egg.
3. 3
   Add cheese, leaving enough to sprinkle on top.
4. 4
   Pour into buttered casserole dish.
5. 5
   Mix mustard and salt with 1 teaspoon hot water; add milk, then pour mixture over casserole.
6. 6
   Sprinkle with remaining cheese.
7. 7
   Bake at 350° for 30 to 45 minutes until custard is set and top is a crusty golden brown.